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A mathematical model for assessment of material requirements for cable supported bridges: implications for conceptual design

The paper presents a sophisticated mathematical model, for the prediction of span/dip ratios that correspond to minimum material requirements for cable-supported bridges and associated environmental/ carbon footprint concerns. The model gives quantifiable limits on spans, which show that super-long, cable-stayed bridges of span above 5000 m planned for the future (as proposed by Yao-Jun and Hai-Fan, Proc. IStructE Centenary Conference, Hong Kong, 2008, 120-143, for example) are not achievable with the currently available material densities and strengths. Consequently, this has led to a new research programme carried out by the author and a new PhD student, appointed in January 2013.